At the age of seven, Shen Tang was sold as a child bride and lived with Pei Yan, her childhood sweetheart. He promised to marry her when he became successful, but after passing the imperial examination at the age of seventeen, he personally sent her to someone else's bed - just because the prince of the Hou family took a second look, and he had nothing at that time.
Three years later, Pei Yan gained power, married a wife and had children, but turned around and became obsessed with her. He threatened her husband's life in exchange for one night; she found the dagger he had prepared under the pillow - he was waiting for her to kill him as atonement.
But what really made her give up was when she saw him holding his wife and children on Shangyuan Festival, with a light in his eyes. She finally understood: He already had a new life, and she was the only one who was still trapped in the winter night when she was seventeen years old.
Later, she chose to stay, not to forgive, but to finally learn to live for herself.